gcc-4_9/gcc/testsuite/gcc.target/mips/20140928.c

   1 /* { dg-do compile } */
   2
   3 NOMIPS16 int NoBarrier_AtomicIncrement(volatile int* ptr, int increment) {
   4   int temp, temp2;
   5   __asm__ __volatile__(".set push\n"
   6                        ".set noreorder\n"
   7                        "1:\n"
   8                        "ll %0, 0(%3)\n"
   9                        "addu %1, %0, %2\n"
  10                        "sc %1, 0(%3)\n"
  11                        "beqz %1, 1b\n"
  12                        "nop\n"
  13                        "addu %1, %0, %2\n"
  14                        ".set pop\n"
  15                        : "=&r" (temp), "=&r" (temp2)
  16                        : "Ir" (increment), "r" (ptr)
  17                        : "memory");
  18
  19   return temp2;
  20 }